#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;

int main() {
    vector<string> jeonguk = {"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};
    vector<string> shaman = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"};
    vector<int> DEAD666 = {101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997};
    string BTS;
    vector<string> chis;

    getline(cin, BTS);
    istringstream iss(BTS);
    vector<string> tokens(istream_iterator<string>{iss}, istream_iterator<string>());

    if (tokens.size() != 3 || tokens[0] == "zero") {
        cout << "Wrong input" << endl;
        return 0;
    }

    for (const auto& token : tokens) {
        if (find(jeonguk.begin(), jeonguk.end(), token) == jeonguk.end()) {
            cout << "Wrong input" << endl;
            return 0;
        }
    }

    for (const auto& token : tokens) {
        int index = find(jeonguk.begin(), jeonguk.end(), token) - jeonguk.begin();
        chis.push_back(shaman[index]);
    }

    int chis_int = stoi(accumulate(chis.begin(), chis.end(), string("")));

    if (find(DEAD666.begin(), DEAD666.end(), chis_int) != DEAD666.end()) {
        cout << chis_int << endl;
    } else {
        DEAD666.push_back(chis_int);
        sort(DEAD666.begin(), DEAD666.end());
        auto it = find(DEAD666.begin(), DEAD666.end(), chis_int);
        int Taganrok = *(it + 1);
        int Temryk = *(it - 1);
        if (Taganrok - chis_int < chis_int - Temryk) {
            cout << Taganrok << endl;
        } else if (Taganrok - chis_int > chis_int - Temryk) {
            cout << Temryk << endl;
        } else {
            cout << Temryk << endl;
        }
    }

    return 0;
}